Dear lord, this poor poor horse. Several discussions on this already, try the search bar at the top of the page. I like LED's or my free federal signal halogen rotator better myself though just answer your question.
Of the three type that are commonly available they each have pros and cons in my book.
Halogen:Pros: Affordable, simple.
Cons: Replace often.
Strobe: Pros: Bright day or night, easy to see.
Cons: Trigger seizures with Epileptics, cost a little more.
LED: Pros: Simple system, low draw, bright light.
Cons: Expensive, and a pain in the butt when it's dark out and they blind you.
This is my opinion.